Before anyone barks, I'm going to credit Mike Reynolds for posting this on FriendFeed.
Yes, it's another Twitter app!
WhoShouldIFollow.com (really, seriously..) is a website where you can type in your Twitter ID and get a list of recommended follows for you, based on 'popular' or 'location' or both.
Since I just added about 70 last weekend , I didn't click on any (yet), but some of the recommends were in line with my interests and / or audience.
Give it a spin here.